First of all, thanks, Floyd, for your reply.

I downloaded your zipfile and extracted the two Choir Clap 2 and 4 .wav files and put them into the percussion loops directory, under loops, under RealTracks. I set both to Stretch/120/4, but when I select them as a LOOP in a song, I only get one clap per measure, at about 2-and-an-eighth beats into the measure. Can you tell what I am doing wrong?

Thanks.